Add a multiple input devices test (#651)

Add a multiple input devices test

Add a test to check if we can open multiple input devices at the same
time. This is a simple check for BMO 1238038.

1 files changed, 134 insertions, 0 deletions

diff --git a/test/test_duplex.cpp b/test/test_duplex.cpp
index bc71431..3620bf0 100644
--- a/test/test_duplex.cpp
+++ b/test/test_duplex.cpp
@@ -179,3 +179,137 @@ TEST(cubeb, duplex_collection_change)
   ASSERT_EQ(r, CUBEB_OK) << "Error initializing cubeb stream";
   cubeb_stream_destroy(stream);
 }
+
+long data_cb_input(cubeb_stream * stream, void * user, const void * inputbuffer, void * outputbuffer, long nframes)
+{
+  if (stream == NULL || inputbuffer == NULL || outputbuffer != NULL) {
+    return CUBEB_ERROR;
+  }
+
+  return nframes;
+}
+
+void state_cb_input(cubeb_stream * stream, void * /*user*/, cubeb_state state)
+{
+  if (stream == NULL)
+    return;
+
+  switch (state) {
+  case CUBEB_STATE_STARTED:
+    fprintf(stderr, "stream started\n"); break;
+  case CUBEB_STATE_STOPPED:
+    fprintf(stderr, "stream stopped\n"); break;
+  case CUBEB_STATE_DRAINED:
+    fprintf(stderr, "stream drained\n"); break;
+  case CUBEB_STATE_ERROR:
+    fprintf(stderr, "stream runs into error state\n"); break;
+  default:
+    fprintf(stderr, "unknown stream state %d\n", state);
+  }
+
+  return;
+}
+
+std::vector<cubeb_devid> get_devices(cubeb * ctx, cubeb_device_type type) {
+  std::vector<cubeb_devid> devices;
+
+  cubeb_device_collection collection;
+  int r = cubeb_enumerate_devices(ctx, type, &collection);
+
+  if (r != CUBEB_OK) {
+    fprintf(stderr, "Failed to enumerate devices\n");
+    return devices;
+  }
+
+  for (uint32_t i = 0; i < collection.count; i++) {
+    if (collection.device[i].state == CUBEB_DEVICE_STATE_ENABLED) {
+      devices.emplace_back(collection.device[i].devid);
+    }
+  }
+
+  cubeb_device_collection_destroy(ctx, &collection);
+
+  return devices;
+}
+
+TEST(cubeb, one_duplex_one_input)
+{
+  cubeb *ctx;
+  cubeb_stream *duplex_stream;
+  cubeb_stream_params input_params;
+  cubeb_stream_params output_params;
+  int r;
+  user_state_duplex duplex_stream_state;
+  uint32_t latency_frames = 0;
+
+  r = common_init(&ctx, "Cubeb duplex example");
+  ASSERT_EQ(r, CUBEB_OK) << "Error initializing cubeb library";
+
+  std::unique_ptr<cubeb, decltype(&cubeb_destroy)>
+    cleanup_cubeb_at_exit(ctx, cubeb_destroy);
+
+  /* This test needs at least two available input devices. */
+  std::vector<cubeb_devid> input_devices = get_devices(ctx, CUBEB_DEVICE_TYPE_INPUT);
+  if (input_devices.size() < 2) {
+    return;
+  }
+
+  /* This test needs at least one available output device. */
+  std::vector<cubeb_devid> output_devices = get_devices(ctx, CUBEB_DEVICE_TYPE_OUTPUT);
+  if (output_devices.size() < 1) {
+    return;
+  }
+
+  cubeb_devid duplex_input = input_devices.front();
+  cubeb_devid duplex_output = nullptr; // default device
+  cubeb_devid input_only = input_devices.back();
+
+  /* typical use-case: mono voice input, stereo output, low latency. */
+  input_params.format = STREAM_FORMAT;
+  input_params.rate = SAMPLE_FREQUENCY;
+  input_params.channels = INPUT_CHANNELS;
+  input_params.layout = CUBEB_LAYOUT_UNDEFINED;
+  input_params.prefs = CUBEB_STREAM_PREF_VOICE;
+
+  output_params.format = STREAM_FORMAT;
+  output_params.rate = SAMPLE_FREQUENCY;
+  output_params.channels = OUTPUT_CHANNELS;
+  output_params.layout = OUTPUT_LAYOUT;
+  output_params.prefs = CUBEB_STREAM_PREF_NONE;
+
+  r = cubeb_get_min_latency(ctx, &output_params, &latency_frames);
+  ASSERT_EQ(r, CUBEB_OK) << "Could not get minimal latency";
+
+  r = cubeb_stream_init(ctx, &duplex_stream, "Cubeb duplex",
+                        duplex_input, &input_params, duplex_output, &output_params,
+                        latency_frames, data_cb_duplex, state_cb_duplex, &duplex_stream_state);
+  ASSERT_EQ(r, CUBEB_OK) << "Error initializing duplex cubeb stream";
+
+  std::unique_ptr<cubeb_stream, decltype(&cubeb_stream_destroy)>
+    cleanup_stream_at_exit(duplex_stream, cubeb_stream_destroy);
+
+  r = cubeb_stream_start(duplex_stream);
+  ASSERT_EQ(r, CUBEB_OK) << "Could not start duplex stream";
+  delay(500);
+
+  cubeb_stream *input_stream;
+  r = cubeb_stream_init(ctx, &input_stream, "Cubeb input",
+                        input_only, &input_params, NULL, NULL,
+                        latency_frames, data_cb_input, state_cb_input, nullptr);
+  ASSERT_EQ(r, CUBEB_OK) << "Error initializing input-only cubeb stream";
+
+  std::unique_ptr<cubeb_stream, decltype(&cubeb_stream_destroy)>
+    cleanup_input_stream_at_exit(input_stream, cubeb_stream_destroy);
+  
+  r = cubeb_stream_start(input_stream);
+  ASSERT_EQ(r, CUBEB_OK) << "Could not start input stream";
+  delay(500);
+
+  r = cubeb_stream_stop(duplex_stream);
+  ASSERT_EQ(r, CUBEB_OK) << "Could not stop duplex stream";
+
+  r = cubeb_stream_stop(input_stream);
+  ASSERT_EQ(r, CUBEB_OK) << "Could not stop input stream";
+
+  ASSERT_FALSE(duplex_stream_state.invalid_audio_value.load());
+}